# HG changeset patch
# User Nicholas Jillings <n.g.r.jillings@se14.qmul.ac.uk>
# Date 1458135102 0
# Node ID c99d334d85347e12b4f4cabcd5031ffd916b270f
# Parent  4a221e7613840d90f256998ff65f886ab809bde9
WIP. ABX Framework. Minor core.js modifications.

diff -r 4a221e761384 -r c99d334d8534 core.js
--- a/core.js	Tue Mar 15 15:33:29 2016 +0000
+++ b/core.js	Wed Mar 16 13:31:42 2016 +0000
@@ -281,69 +281,82 @@
 	switch(specification.interface)
 	{
 		case "APE":
-		interfaceJS.setAttribute("src","interfaces/ape.js");
-		
-		// APE comes with a css file
-		var css = document.createElement('link');
-		css.rel = 'stylesheet';
-		css.type = 'text/css';
-		css.href = 'interfaces/ape.css';
-		
-		document.getElementsByTagName("head")[0].appendChild(css);
-		break;
-		
+            interfaceJS.setAttribute("src","interfaces/ape.js");
+
+            // APE comes with a css file
+            var css = document.createElement('link');
+            css.rel = 'stylesheet';
+            css.type = 'text/css';
+            css.href = 'interfaces/ape.css';
+
+            document.getElementsByTagName("head")[0].appendChild(css);
+            break;
+
 		case "MUSHRA":
-		interfaceJS.setAttribute("src","interfaces/mushra.js");
-		
-		// MUSHRA comes with a css file
-		var css = document.createElement('link');
-		css.rel = 'stylesheet';
-		css.type = 'text/css';
-		css.href = 'interfaces/mushra.css';
-		
-		document.getElementsByTagName("head")[0].appendChild(css);
-		break;
+            interfaceJS.setAttribute("src","interfaces/mushra.js");
+
+            // MUSHRA comes with a css file
+            var css = document.createElement('link');
+            css.rel = 'stylesheet';
+            css.type = 'text/css';
+            css.href = 'interfaces/mushra.css';
+
+            document.getElementsByTagName("head")[0].appendChild(css);
+            break;
 		
 		case "AB":
-		interfaceJS.setAttribute("src","interfaces/AB.js");
-		
-		// AB comes with a css file
-		var css = document.createElement('link');
-		css.rel = 'stylesheet';
-		css.type = 'text/css';
-		css.href = 'interfaces/AB.css';
-		
-		document.getElementsByTagName("head")[0].appendChild(css);
-		break;
+            interfaceJS.setAttribute("src","interfaces/AB.js");
+
+            // AB comes with a css file
+            var css = document.createElement('link');
+            css.rel = 'stylesheet';
+            css.type = 'text/css';
+            css.href = 'interfaces/AB.css';
+
+            document.getElementsByTagName("head")[0].appendChild(css);
+            break;
+            
+        case "ABX":
+            interfaceJS.setAttribute("src","interfaces/ABX.js");
+
+            // AB comes with a css file
+            var css = document.createElement('link');
+            css.rel = 'stylesheet';
+            css.type = 'text/css';
+            css.href = 'interfaces/ABX.css';
+
+            document.getElementsByTagName("head")[0].appendChild(css);
+            break;
+        
 		case "Bipolar":
 		case "ACR":
 		case "DCR":
 		case "CCR":
 		case "ABC":
-		// Above enumerate to horizontal sliders
-		interfaceJS.setAttribute("src","interfaces/horizontal-sliders.js");
-		
-		// horizontal-sliders comes with a css file
-		var css = document.createElement('link');
-		css.rel = 'stylesheet';
-		css.type = 'text/css';
-		css.href = 'interfaces/horizontal-sliders.css';
-		
-		document.getElementsByTagName("head")[0].appendChild(css);
-		break;
+            // Above enumerate to horizontal sliders
+            interfaceJS.setAttribute("src","interfaces/horizontal-sliders.js");
+
+            // horizontal-sliders comes with a css file
+            var css = document.createElement('link');
+            css.rel = 'stylesheet';
+            css.type = 'text/css';
+            css.href = 'interfaces/horizontal-sliders.css';
+
+            document.getElementsByTagName("head")[0].appendChild(css);
+            break;
 		case "discrete":
 		case "likert":
-		// Above enumerate to horizontal discrete radios
-		interfaceJS.setAttribute("src","interfaces/discrete.js");
-		
-		// horizontal-sliders comes with a css file
-		var css = document.createElement('link');
-		css.rel = 'stylesheet';
-		css.type = 'text/css';
-		css.href = 'interfaces/discrete.css';
-		
-		document.getElementsByTagName("head")[0].appendChild(css);
-		break;
+            // Above enumerate to horizontal discrete radios
+            interfaceJS.setAttribute("src","interfaces/discrete.js");
+
+            // horizontal-sliders comes with a css file
+            var css = document.createElement('link');
+            css.rel = 'stylesheet';
+            css.type = 'text/css';
+            css.href = 'interfaces/discrete.css';
+
+            document.getElementsByTagName("head")[0].appendChild(css);
+            break;
 	}
 	document.getElementsByTagName("head")[0].appendChild(interfaceJS);
 	
diff -r 4a221e761384 -r c99d334d8534 example_eval/ABX_example.xml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/example_eval/ABX_example.xml	Wed Mar 16 13:31:42 2016 +0000
@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="utf-8"?>
+<waet xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="test-schema.xsd">
+	<setup interface="ABX" projectReturn="save.php" randomiseOrder='true' testPages="2" loudness="-23" sampleRate="44100">
+		<survey location="before">
+			<surveyentry type="question" id="sessionId" mandatory="true">
+				<statement>Please enter your name.</statement>
+			</surveyentry>
+			<surveyentry type="checkbox" id="checkboxtest" mandatory="true">
+				<statement>Please select with which activities you have any experience (example checkbox question)</statement>
+				<option name="musician">Playing a musical instrument</option>
+				<option name="soundengineer">Recording or mixing audio</option>
+				<option name="developer">Developing audio software</option>
+				<option name="hwdesigner">Designing or building audio hardware</option>
+				<option name="researcher">Research in the field of audio</option>
+			</surveyentry>
+			<surveyentry type="statement" id="test-intro">
+				<statement>This is an example of an 'AB'-style test, with two pages, using the test stimuli in 'example_eval/'.</statement>
+			</surveyentry>
+		</survey>
+		<survey location="after">
+			<surveyentry type="question" id="location" mandatory="true" boxsize="large">
+				<statement>Please enter your location. (example mandatory text question)</statement>
+			</surveyentry>
+			<surveyentry type="number" id="age" min="0">
+				<statement>Please enter your age (example non-mandatory number question)</statement>
+			</surveyentry>
+			<surveyentry type="radio" id="rating">
+				<statement>Please rate this interface (example radio button question)</statement>
+				<option name="bad">Bad</option>
+				<option name="poor">Poor</option>
+				<option name="good">Good</option>
+				<option name="great">Great</option>
+			</surveyentry>
+			<surveyentry type="statement" id="test-thank-you">
+				<statement>Thank you for taking this listening test. Please click 'submit' and your results will appear in the 'saves/' folder.</statement>
+			</surveyentry>
+		</survey>
+		<metric>
+			<metricenable>testTimer</metricenable>
+			<metricenable>elementTimer</metricenable>
+			<metricenable>elementInitialPosition</metricenable>
+			<metricenable>elementTracker</metricenable>
+			<metricenable>elementFlagListenedTo</metricenable>
+			<metricenable>elementFlagMoved</metricenable>
+			<metricenable>elementListenTracker</metricenable>
+		</metric>
+		<interface>
+			<interfaceoption type="check" name="fragmentMoved"/>
+			<interfaceoption type="check" name="scalerange" min="25" max="75"/>
+			<interfaceoption type="show" name='playhead'/>
+			<interfaceoption type="show" name="page-count"/>
+            <interfaceoption type="show" name='volume'/>
+		</interface>
+	</setup>
+	<page id='test-0' hostURL="example_eval/" randomiseOrder='true' repeatCount='0' loop='true' showElementComments='true' loudness="-12">
+		<commentboxprefix>Comment on fragment</commentboxprefix>
+		<interface>
+			<title>Depth</title>
+		</interface>
+		<audioelement url="0.wav" id="track-0"/>
+		<audioelement url="1.wav" id="track-1"/>
+		<survey location="before">
+			<surveyentry type="statement" id="test-0-intro">
+				<statement>A two way comparison using randomised element order, automatic loudness and synchronised looping.</statement>
+			</surveyentry>
+		</survey>
+		<survey location="after">
+			<surveyentry type="question" id="genre-0" mandatory="true">
+				<statement>Please enter the genre.</statement>
+			</surveyentry>
+		</survey>
+	</page>
+	<page id='test-1' hostURL="example_eval/" randomiseOrder='true' repeatCount='0' loop='false' showElementComments='true' loudness="-12">
+		<commentboxprefix>Comment on fragment</commentboxprefix>
+		<interface>
+			<title>Depth</title>
+		</interface>
+		<audioelement url="0.wav" id="track-2"/>
+		<audioelement url="1.wav" id="track-3"/>
+		<survey location="before"/>
+		<survey location="after">
+			<surveyentry type="question" id="genre-1" mandatory="true">
+				<statement>Please enter the genre.</statement>
+			</surveyentry>
+		</survey>
+	</page>
+</waet>
\ No newline at end of file
diff -r 4a221e761384 -r c99d334d8534 interfaces/ABX.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/interfaces/ABX.css	Wed Mar 16 13:31:42 2016 +0000
@@ -0,0 +1,90 @@
+body {
+	/* Set the background colour (note US English spelling) to grey*/
+	background-color: #fff
+}
+
+div.pageTitle {
+	width: auto;
+	height: 20px;
+	margin-top: 20px;
+}
+
+div.pageTitle span{
+	font-size: 1.5em;
+}
+
+div.testHalt {
+	/* Specify any colouring during the test halt for pre/post questions */
+	background-color: rgba(0,0,0,0.5);
+	/* Don't mess with this bit */
+	z-index: 2;
+	width: 100%;
+	height: 100%;
+	position: absolute;
+	left: 0px;
+	top: 0px;
+}
+
+button {
+	/* Specify any button structure or style */
+	min-width: 20px;
+	background-color: #ddd
+}
+
+button.big-button {
+	width: 250px;
+	height: 40px;
+	font-size: 1.2em;
+}
+
+div.comparator-holder {
+	width: 260px;
+	height: 300px;
+	border:  black 1px solid;
+    float: left;
+	padding-top: 5px;
+    margin: 25px;
+}
+
+div.comparator-selector {
+	width: 248px;
+	height: 250px;
+	border: black 1px solid;
+	position: relative;
+	background-color: #FF0000;
+    border-radius: 20px;
+}
+
+div.disabled {
+	background-color: #AAA;
+}
+
+div.selected {
+	background-color: #008000;
+}
+
+div.comparator-selector span {
+	font-size: 4em;
+}
+
+button.comparator-button {
+	width: 250px;
+	height: 38px;
+	position: relative;
+	margin-top: 5px;
+}
+
+div.playhead {
+    margin: 5px;
+}
+
+div#page-count {
+    float: left;
+    margin: 0px 5px;
+}
+
+div#master-volume-holder {
+    position: absolute;
+    top: 10px;
+    left: 120px;
+}
\ No newline at end of file
diff -r 4a221e761384 -r c99d334d8534 interfaces/ABX.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/interfaces/ABX.js	Wed Mar 16 13:31:42 2016 +0000
@@ -0,0 +1,345 @@
+/**
+ * WAET Blank Template
+ * Use this to start building your custom interface
+ */
+
+// Once this is loaded and parsed, begin execution
+loadInterface();
+
+function loadInterface() {
+	// Use this to do any one-time page / element construction. For instance, placing any stationary text objects,
+	// holding div's, or setting up any nodes which are present for the entire test sequence
+    
+    // Custom comparator Object
+	Interface.prototype.comparator = null;
+    
+    // The injection point into the HTML page
+	interfaceContext.insertPoint = document.getElementById("topLevelBody");
+	var testContent = document.createElement('div');
+	testContent.id = 'testContent';
+    
+    // Create the top div for the Title element
+	var titleAttr = specification.title;
+	var title = document.createElement('div');
+	title.className = "title";
+	title.align = "center";
+	var titleSpan = document.createElement('span');
+    
+    // Set title to that defined in XML, else set to default
+	if (titleAttr != undefined) {
+		titleSpan.textContent = titleAttr;
+	} else {
+		titleSpan.textContent =  'Listening test';
+	}
+	// Insert the titleSpan element into the title div element.
+	title.appendChild(titleSpan);
+    
+    var pagetitle = document.createElement('div');
+	pagetitle.className = "pageTitle";
+	pagetitle.align = "center";
+	var titleSpan = document.createElement('span');
+	titleSpan.id = "pageTitle";
+	pagetitle.appendChild(titleSpan);
+	
+	// Create Interface buttons!
+	var interfaceButtons = document.createElement('div');
+	interfaceButtons.id = 'interface-buttons';
+	interfaceButtons.style.height = '25px';
+	
+	// Create playback start/stop points
+	var playback = document.createElement("button");
+	playback.innerHTML = 'Stop';
+	playback.id = 'playback-button';
+	playback.style.float = 'left';
+	// onclick function. Check if it is playing or not, call the correct function in the
+	// audioEngine, change the button text to reflect the next state.
+	playback.onclick = function() {
+		if (audioEngineContext.status == 1) {
+			audioEngineContext.stop();
+			this.innerHTML = 'Stop';
+            var time = audioEngineContext.timer.getTestTime();
+            console.log('Stopped at ' + time); // DEBUG/SAFETY
+		}
+	};
+	// Append the interface buttons into the interfaceButtons object.
+	interfaceButtons.appendChild(playback);
+	
+	// Global parent for the comment boxes on the page
+	var feedbackHolder = document.createElement('div');
+	feedbackHolder.id = 'feedbackHolder';
+	
+	// Construct the AB Boxes
+	var boxes = document.createElement('div');
+	boxes.align = "center";
+	boxes.id = "box-holders";
+    boxes.style.float = "left";
+	
+	var submit = document.createElement('button');
+	submit.id = "submit";
+	submit.onclick = buttonSubmitClick;
+	submit.className = "big-button";
+	submit.textContent = "submit";
+	submit.style.position = "relative";
+	submit.style.left = (window.innerWidth-250)/2 + 'px';
+		
+	feedbackHolder.appendChild(boxes);
+	
+	// Inject into HTML
+	testContent.appendChild(title); // Insert the title
+	testContent.appendChild(pagetitle);
+	testContent.appendChild(interfaceButtons);
+	testContent.appendChild(feedbackHolder);
+	testContent.appendChild(submit);
+	interfaceContext.insertPoint.appendChild(testContent);
+
+	// Load the full interface
+	testState.initialise();
+	testState.advanceState();
+};
+
+function loadTest(page)
+{
+	// Called each time a new test page is to be build. The page specification node is the only item passed in
+    interfaceContext.comparator = new comparator(page);
+}
+
+function comparator(page)
+{
+    // Build prototype constructor
+    this.interfaceObject = function(element,label)
+    {
+        // An example node, you can make this however you want for each audioElement.
+        // However, every audioObject (audioEngineContext.audioObject) MUST have an interface object with the following
+        // You attach them by calling audioObject.bindInterface( )
+        this.parent = element;
+        this.id = element.id;
+        this.value = 0;
+        this.disabled = true;
+        this.box = document.createElement('div');
+        this.box.className = 'comparator-holder';
+		this.box.setAttribute('track-id',element.id);
+		this.box.id = 'comparator-'+label;
+        this.selector = document.createElement('div');
+		this.selector.className = 'comparator-selector disabled';
+		var selectorText = document.createElement('span');
+		selectorText.textContent = label;
+		this.selector.appendChild(selectorText);
+		this.playback = document.createElement('button');
+		this.playback.className = 'comparator-button';
+		this.playback.disabled = true;
+		this.playback.textContent = "Listen";
+		this.box.appendChild(this.selector);
+		this.box.appendChild(this.playback);
+        this.selector.onclick = function(event)
+		{
+            var label = event.currentTarget.children[0].textContent;
+            if (label == "X" || label == "x") {return;}
+			var time = audioEngineContext.timer.getTestTime();
+			if ($(event.currentTarget).hasClass('disabled'))
+			{
+				console.log("Please wait until sample has loaded");
+				return;
+			}
+			if (audioEngineContext.status == 0)
+			{
+				alert("Please listen to the samples before making a selection");
+				console.log("Please listen to the samples before making a selection");
+				return;
+            }
+			var id = event.currentTarget.parentElement.getAttribute('track-id');
+			interfaceContext.comparator.selected = id;
+            if ($(event.currentTarget).hasClass("selected")) {
+                $(".comparator-selector").removeClass('selected');
+                for (var i=0; i<interfaceContext.comparator.comparators.length; i++)
+                {
+                     var obj = interfaceContext.comparator.comparators[i];
+                    obj.parent.metric.moved(time,0);
+                }
+            } else {
+                $(".comparator-selector").removeClass('selected');
+                $(event.currentTarget).addClass('selected');
+                for (var i=0; i<interfaceContext.comparator.comparators.length; i++)
+                {
+                    var obj = interfaceContext.comparator.comparators[i];
+                    if (i == id) {
+                        obj.value = 1;
+                    } else {
+                        obj.value = 0;
+                    }
+                    obj.parent.metric.moved(time,obj.value);
+                }
+                console.log("Selected "+id+' ('+time+')');
+            }
+		};
+        this.playback.setAttribute("playstate","ready");
+		this.playback.onclick = function(event)
+		{
+			var id = event.currentTarget.parentElement.getAttribute('track-id');
+            if (event.currentTarget.getAttribute("playstate") == "ready")
+            {
+                audioEngineContext.play(id);
+            } else if (event.currentTarget.getAttribute("playstate") == "playing") {
+                audioEngineContext.stop();
+            }
+			
+		};
+        this.enable = function()
+        {
+            // This is used to tell the interface object that playback of this node is ready
+            if (this.parent.state == 1)
+			{
+				$(this.selector).removeClass('disabled');
+				this.playback.disabled = false;
+			}
+        };
+        this.updateLoading = function(progress)
+        {
+            // progress is a value from 0 to 100 indicating the current download state of media files
+            if (progress != 100)
+			{
+				progress = String(progress);
+				progress = progress.split('.')[0];
+				this.playback.textContent = progress+'%';
+			} else {
+				this.playback.textContent = "Play";
+			}
+        };
+        this.error = function() {
+            // audioObject has an error!!
+            this.playback.textContent = "Error";
+            $(this.playback).addClass("error-colour");
+        };
+        this.startPlayback = function()
+        {
+            // Called when playback has begun
+            $('.comparator-button').text('Listen');
+            $(this.playback).text('Stop');
+            this.playback.setAttribute("playstate","playing");
+        };
+        this.stopPlayback = function()
+        {
+            // Called when playback has stopped. This gets called even if playback never started!
+            $(this.playback).text('Listen');
+            this.playback.setAttribute("playstate","ready");
+        };
+        this.getValue = function()
+        {
+            // Return the current value of the object. If there is no value, return 0
+            return this.value;
+        };
+        this.getPresentedId = function()
+        {
+            // Return the presented ID of the object. For instance, the APE has sliders starting from 0. Whilst AB has alphabetical scale
+            return this.selector.children[0].textContent;
+        };
+        this.canMove = function()
+        {
+            // Return either true or false if the interface object can be moved. AB / Reference cannot, whilst sliders can and therefore have a continuous scale.
+            // These are checked primarily if the interface check option 'fragmentMoved' is enabled.
+            return false;
+        };
+        this.exportXMLDOM = function(audioObject) {
+            // Called by the audioObject holding this element to export the interface <value> node.
+            // If there is no value node (such as outside reference), return null
+            // If there are multiple value nodes (such as multiple scale / 2D scales), return an array of nodes with each value node having an 'interfaceName' attribute
+            // Use storage.document.createElement('value'); to generate the XML node.
+            var node = storage.document.createElement('value');
+			node.textContent = this.value;
+			return node;
+
+        };
+        this.error = function() {
+            // If there is an error with the audioObject, this will be called to indicate a failure
+        }
+    };
+    // Ensure there are only two comparisons per page
+    if (page.audioElements.length != 2) {
+        console.error('FATAL - There must be 2 <audioelement> nodes on each <page>: '+page.id);
+        return;
+    }
+    // Build the three audio elements
+    this.pair = [];
+    this.X = null;
+    this.boxHolders = document.getElementById('box-holders');
+    for (var index=0; index<page.audioElements.length; index++) {
+        var element = page.audioElements[index];
+        if (element.type != 'normal')
+		{
+			console.log("WARNING - ABX can only have normal elements. Page "+page.id+", Element "+element.id);
+            element.type = "normal";
+		}
+        var audioObject = audioEngineContext.newTrack(element);
+        var label;
+        switch(audioObject.specification.parent.label) {
+            case "none":
+                label = "";
+                break;
+            case "number":
+                label = ""+index;
+                break;
+            case "letter":
+                label = String.fromCharCode(97 + index);
+                break;
+            default:
+                label = String.fromCharCode(65 + index);
+                break;
+        }
+        var node = new this.interfaceObject(audioObject,label);
+        audioObject.bindInterface(node);
+        this.pair.push(node);
+        this.boxHolders.appendChild(node.box);
+    }
+    var elementId = Math.floor(Math.random() * 2); //Randomly pick A or B to be X
+    var element = new page.audioElementNode();
+    for (var atr in page.audioElements[elementId]) {
+        eval("element."+atr+" = page.audioElements[elementId]."+atr);
+    }
+    element.id += "-X";
+    if (typeof element.name == "string") {element.name+="-X";}
+    page.audioElements.push(element);
+    // Create the save place-holder for the 'X' element
+    var root = testState.currentStore.XMLDOM;
+    var aeNode = storage.document.createElement('audioelement');
+    aeNode.setAttribute('ref',element.id);
+    if (typeof element.name == "string"){aeNode.setAttribute('name',element.name);}
+    aeNode.setAttribute('type','normal');
+    aeNode.setAttribute('url',element.url);
+    aeNode.setAttribute('gain',element.gain);
+    aeNode.appendChild(storage.document.createElement('metric'));
+    root.appendChild(aeNode);
+    // Build the 'X' element
+    var audioObject = audioEngineContext.newTrack(element);
+    var label;
+    switch(audioObject.specification.parent.label) {
+        case "letter":
+            label = "x";
+            break;
+        default:
+            label = "X";
+            break;
+    }
+    var node = new this.interfaceObject(audioObject,label);
+    audioObject.bindInterface(node);
+    this.X = node;
+    this.boxHolders.appendChild(node.box);
+}
+
+function resizeWindow(event)
+{
+	// Called on every window resize event, use this to scale your page properly
+}
+
+function buttonSubmitClick()
+{
+    testState.advanceState();
+}
+
+function pageXMLSave(store, pageSpecification)
+{
+	// MANDATORY
+	// Saves a specific test page
+	// You can use this space to add any extra nodes to your XML <audioHolder> saves
+	// Get the current <page> information in store (remember to appendChild your data to it)
+	// pageSpecification is the current page node configuration
+	// To create new XML nodes, use storage.document.createElement();
+}
\ No newline at end of file